2017-11-20-tidb-weekly.md

title	date	summary	tags
Weekly update (November 13 ~ November 19, 2017)	2017-11-20	Last week, we landed 48 PRs in the TiDB repositories, 3 PRs in the TiSpark repositories, and 23 PRs in the TiKV repositories.	TiDB TiKV TiSpark

Weekly update in TiDB

Last week, we landed 48 PRs in the TiDB repositories.

Removed

• Remove redundant ResolveIndices.
• Remove useless error return.

Fixed

• Fix the index recognized as prefix index when the column length is enlarged.
• Check the MaxInt64 and MinInt64 to avoid range error.
• Fix the estimation in betweenRowCount.
• Refine sql_mode no_backslash_escapes.
• Add deep copies for the update operation.
• Refine projection elimination when projection is the inner child of an outer join.
• Fix a data race in dataReaderBuilder.
• Support not in and correct the behavior.

Improved

• Remove returned value isNull in Row methods.
• Replace *ast.Row with types.Row and prepare to use Chunk.
• Increase the batch size slowly for double read, which benefits small queries.
• Remove unionscan schema and add LogicalUnionScan.
• Build the logical plan to check the column name validation when doPrepare.
• Covert max/min to Limit + Sort operators.
• Support adding columns with parentheses.
• Prealloced space.
• Ignore the DDL statement for query duration metrics.
• Refine the use of idAllocator.
• Use baseExecutor for all Executors.
• Support decoding data to Chunk.
• Make tokenLimit configurable.

New contributors (Thanks!)

• liubo
• ZhengQian
• Zhengwanbo

Weekly update in TiSpark

Last week, we landed 3 PRs in the TiSpark repositories.

Fixed

• Fix the unsupported expression error of not being pushed back.
• Fix the thread pool error of not closing properly.
• Fix the Bit type being pushed down.

Weekly update in TiKV

Last week, we landed 23 PRs in the TiKV repositories.

Added

• Add more observers.
• Support configuring namespaces.

Fixed

• Fix a range check in debugging API.
• Fix CI execution.
• Make the progresses stored in Raft leader never false positive.
• Fix the Chunk size of coprocessor response.
• Fix a potential dead lock when resolving address.
• Return the correct leader when the NotLeader error occurs.
• Fix wrong log info.

Improved

• As a part of introducing streaming, remove lifetime in the transaction layer.
• Code cleanup.
  • Move mod debug from raftstore into server
  • Fix typos
  • Move opt into clusterInfo
  • Clean up scheduelr
  • Move server methods to server.go
• Use git describe to assign PDReleaseVersion.
• Prealloc pre-makes space.
• Use CGO_ENABLED instead of ENABLE_CGO.
• Add the log signal before exit.
• Limit the duration metric buckets of gRPC messages.
• Shorten write guard lifetime when sending the snapshot.

New contributors (Thanks!)

• Drogon